JURASSIC ANIMALS. 



429 



Fig. 640. 







Fig. 639 



Fig. 642. 



Fig. 643. 



Fig. 644. 



Figs. 639-644.— Jurassic Corals and Echinoderms: 639. Prionastrea oblongata. 640. Apiocrinus 

 Roissianus. 641. Saccocoma pectinata(a freeCrinoid). 642. Asteria lombricalis. 643. Clypeus 

 Plotii. 644. a b, Hemicidaris crenularis. 



observe that the highest order of Cephalopods, the Dibranchs, by far 

 the most abundantly represented at the present time, were introduced 

 here for the first time. 



Fig. 645. 



Fig. 647. 



Figs. 645-647.— Jurassic Lajhellibranchs and Brachiopods 

 op England : 645. Diceras Arietina. Middle OSlite (after 

 Nicholson). 646. Astarte excavata. 647. Trigonia cla- 

 vellata. 



